Last change
on this file since 2044 was 821, checked in by Bruno Cornec, 18 years ago |
Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
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File size:
1.1 KB
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1 | /*
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2 | * xgetcwd.c -- return current directory with unlimited length
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3 | * Copyright (C) 1992, 1996 Free Software Foundation, Inc.
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4 | * Written by David MacKenzie <djm@gnu.ai.mit.edu>.
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5 | *
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6 | * Special function for busybox written by Vladimir Oleynik <dzo@simtreas.ru>
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7 | */
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8 |
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9 | #include <stdlib.h>
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10 | #include <errno.h>
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11 | #include <unistd.h>
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12 | #include <limits.h>
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13 | #include <sys/param.h>
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14 | #include "libbb.h"
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15 |
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16 | /* Amount to increase buffer size by in each try. */
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17 | #define PATH_INCR 32
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18 |
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19 | /* Return the current directory, newly allocated, arbitrarily long.
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20 | Return NULL and set errno on error.
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21 | If argument is not NULL (previous usage allocate memory), call free()
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22 | */
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23 |
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24 | char *
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25 | xgetcwd (char *cwd)
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26 | {
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27 | char *ret;
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28 | unsigned path_max;
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29 |
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30 | path_max = (unsigned) PATH_MAX;
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31 | path_max += 2; /* The getcwd docs say to do this. */
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32 |
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33 | if(cwd==0)
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34 | cwd = xmalloc (path_max);
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35 |
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36 | while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE) {
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37 | path_max += PATH_INCR;
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38 | cwd = xrealloc (cwd, path_max);
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39 | }
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40 |
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41 | if (ret == NULL) {
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42 | free (cwd);
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43 | bb_perror_msg("getcwd()");
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44 | return NULL;
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45 | }
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46 |
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47 | return cwd;
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48 | }
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